From c151b32b1de7a464620d3cc7a827b50dd83388ed Mon Sep 17 00:00:00 2001
From: Will Hunt <will@half-shot.uk>
Date: Thu, 16 Aug 2018 14:23:38 +0100
Subject: [PATCH] Add GET media/v1/config (#3184)

---
 changelog.d/3184.feature                  |  1 +
 synapse/rest/media/v1/config_resource.py  | 48 +++++++++++++++++++++++
 synapse/rest/media/v1/media_repository.py |  3 +-
 3 files changed, 51 insertions(+), 1 deletion(-)
 create mode 100644 changelog.d/3184.feature
 create mode 100644 synapse/rest/media/v1/config_resource.py

diff --git a/changelog.d/3184.feature b/changelog.d/3184.feature
new file mode 100644
index 000000000..9f746a57a
--- /dev/null
+++ b/changelog.d/3184.feature
@@ -0,0 +1 @@
+Add /_media/r0/config
diff --git a/synapse/rest/media/v1/config_resource.py b/synapse/rest/media/v1/config_resource.py
new file mode 100644
index 000000000..d6605b602
--- /dev/null
+++ b/synapse/rest/media/v1/config_resource.py
@@ -0,0 +1,48 @@
+# -*- coding: utf-8 -*-
+# Copyright 2018 Will Hunt <will@half-shot.uk>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from twisted.internet import defer
+from twisted.web.resource import Resource
+from twisted.web.server import NOT_DONE_YET
+
+from synapse.http.server import respond_with_json, wrap_json_request_handler
+
+
+class MediaConfigResource(Resource):
+    isLeaf = True
+
+    def __init__(self, hs):
+        Resource.__init__(self)
+        config = hs.get_config()
+        self.clock = hs.get_clock()
+        self.auth = hs.get_auth()
+        self.limits_dict = {
+            "m.upload.size": config.max_upload_size,
+        }
+
+    def render_GET(self, request):
+        self._async_render_GET(request)
+        return NOT_DONE_YET
+
+    @wrap_json_request_handler
+    @defer.inlineCallbacks
+    def _async_render_GET(self, request):
+        yield self.auth.get_user_by_req(request)
+        respond_with_json(request, 200, self.limits_dict)
+
+    def render_OPTIONS(self, request):
+        respond_with_json(request, 200, {}, send_cors=True)
+        return NOT_DONE_YET
diff --git a/synapse/rest/media/v1/media_repository.py b/synapse/rest/media/v1/media_repository.py
index 4c589e05e..241c97207 100644
--- a/synapse/rest/media/v1/media_repository.py
+++ b/synapse/rest/media/v1/media_repository.py
@@ -42,6 +42,7 @@ from synapse.util.retryutils import NotRetryingDestination
 from synapse.util.stringutils import is_ascii, random_string
 
 from ._base import FileInfo, respond_404, respond_with_responder
+from .config_resource import MediaConfigResource
 from .download_resource import DownloadResource
 from .filepath import MediaFilePaths
 from .identicon_resource import IdenticonResource
@@ -754,7 +755,6 @@ class MediaRepositoryResource(Resource):
         Resource.__init__(self)
 
         media_repo = hs.get_media_repository()
-
         self.putChild("upload", UploadResource(hs, media_repo))
         self.putChild("download", DownloadResource(hs, media_repo))
         self.putChild("thumbnail", ThumbnailResource(
@@ -765,3 +765,4 @@ class MediaRepositoryResource(Resource):
             self.putChild("preview_url", PreviewUrlResource(
                 hs, media_repo, media_repo.media_storage,
             ))
+        self.putChild("config", MediaConfigResource(hs))